PCB

詳細解釋：

PCB

n.（名詞）
Any of a family of industrial compounds produced by chlorination of biphenyl, noted primarily as an environmental pollutant that accumulates in animal tissue with resultant pathogenic and teratogenic effects.
聚氯聯二苯：一種工業化合物，由二苯經氯化作用而產生，被認為是一種環境污染物質，積聚在動物組織中，能導致病原體和產生畸形生長

來源：
p(oly)c(hlorinated) b(iphenyl)
p(oly)c(hlorinated) b(iphenyl)